parse and validate simple name/value option pairs. Example:

  use Data::OptList;

  my $options = Data::Optlist::mkopt([
    qw(key1 key2 key3 key4),
    key5 => { ... },
    key6 => [ ... ],
    key7 => sub { ... },
    key8 => { ... },
    key8 => [ ... ],
  ]);